Philco-Radio-and-Television-Corp-NT-600 电路原理图.pdf

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1、VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION ALL VOLTAGES TAKEN WITH V.T.V.M PRECISION MOOEL 66 UHOER HO SIGNAL CONDITIONS, VOLUME CONTROL AT MINIMUM BATTERY CURRENT UNDER NO SIGNAL CONDITIONS IS 6.BMA I.F. 455 KC. 2SAI0I I QT IF mih i : I j Sv J/ f i j / rkj I1II 77r/r v cv* vi t

2、 i j : i i Ql CONV 2SAI0I 2ND IF 2SAI0I 04 DRIVER 2SBI75B 06 AUDIO OUT X, 2SBI72D X* fll Ui v y 3J c iX-li .a* pH vUsIfJ i I 5 NOTE: WHEN REPLACING BATTERY, NEW BATTERY MAY READ SEVERAL TENTHS OF A VOLT HIGHER THAN ORIGINAL BATTERY. THERE FORE , VOLTAGES MAY READ SLIGHTLY HIGHER THAN THOSE INDICATED

3、 ON BASE LAYOUT. _| 05 AUDIO OUT 2SBI72D Perma Circuit Panel Bottom View, Showing Parts on Top 98 收音机爱 好者资料库 RadioFans.CN VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION PH ILCO ial Cord Stringing - Model NT602 MODEL NT602 (Alignment data on page 100) FREQUENCY COVERAGE: 530KC to 165

4、0KC INTERMEDIATE FREQUENCY: 455KC ANTENNA: Self-contained ferrite Schematic TO BATTERY RI61.3 T2 VIR C.T. TO BATTERY 8 TR, jpg) GREEN VELLOW- DRIVER 1= 2SAIIO El OSC-CONV TO SPEAKER TR5-TR6 OUTPUT 2SB33 Base Layout - NT602 99 收音机爱 好者资料库 RadioFans.CN voltage across voice coi NT8D2 NT900 NT602 VOLUME

5、R-25, MOST-OFTEN-NEEDED 1965 RADIO 07 PHILCO MODELS NT602, NT802, .p 5/jriov / i -| |C9 R8t-il te + )c V.e75v/ * : ; r,- /: f + DETECTOR t ?j .A VCaq -04Ve!j.-;J K i A ov A -WE. R20 R2 ,f CI6 HT802 Perma-CIrcuit Panel, Component Location T03 VOL. CONT. ALIGNMENT PROCEDURE - NT602, NT802 AND NT900 AL

6、IGNMENT: Connect an a-c voltmeter or oscilloscope across speaker voice coil. Con nect ground lead of AM R-F generator to chassis; output lead as indicated in chart. / C22 CONNECTION TO RADIO DIAL SETT NG DIAL SETTING SPECIAL INSTRUCTIONS CONNECT SIGNAL GENERA. TOR THRU A 0. I MF CAPA. COTOR TO RF SE

7、CTION OF GANG C C1 A) 455KC TUN 1NG GANG FULLY OPEN ADJUST FOR MAX. IN ORDER GIVEN USE RADIATING LOOP (SEE NOTE BELOW) 520KC 520KC ADJUST FOR MAX. ROCK TUNING GANG WHILE MAKING ADJUSTMENTS SAME AS STEP 2 1650KC 1650KC ADJUST FOR MAX. OUT PUT SAME AS STEP 2 620KC 620KC SLIDE ANTENNA COIL BACK AND FORTH FOR MAX. OUTPUT SAME AS STEP 2 1400KC I400KC ADJUST FOR MAX. OUT- PUT ANT. ANT. ANT. COIL COIL COIL NOTE: USE A 6 TO 8 INCH DIAMETER LOOP MADE UP OF INSULATED WIRE. CONNECT TO GENERATOR TERMINALS. AND LOOSE COUPLE TO RADIO ANTENNA. 100 收音机爱 好者资料库 RadioFans.CN